took off a year: upon return 8000 spams?

Long story but i set up my site mcclept.com- using wordpress.org (I believe i just found out the difference) but have it hosted somewhere else.
I did not use it much and went back into dashboard after about a year. There are 8000 spams waiting to be approved. I deleted / marked as spam/trashed about 2000 then I got a
"This website is currently over capacity of existing hosting package.
Please contact the hosting provider for upgrade options.

So now I am wondering how this happened since no new images etc were added?
Do I need to get a wordpress.com instead?
I am confused